Brake-head.



H. M. PERRY & C. F. HUNTOON.

BRAKE HEAD.

APPLIGATION FILED 11.13.26, 1909.

' Patented Apr. 9, 1912.

UNITED STATES PATENT OFFICE maar n. rnnnr nnncgpnnrs r. nlmroiv, oremesso, I LLINoIs.

' VBRAKE-HannI 1,022,440. 'aannemen-emergent. Patented Apr.9,1912.

Application mea rebrum 2e, 190s. serial'm. 480,164.

To all rwhom zt may concern: head, showing more particularly the shapeBe it known that we, HUBERT M. PERRY and CHARLES F. HUNTooN, citizens.of the United States, residing in the city ofChicago, county of Cook,and State of Illinois, respectively, have invented certain new anduseful Improvements in Brake-Heads, of which the following is aspecification. This invention relates to improvements in brake heads andrefers more particularly to a bra-ke head of thattype havingangularadjustment whereby the brake shoe may always conform to the tread of thewheel regardless of changes in the position of the brake beam relativeto the latter.

Among the salient objects of the invention are to provide an adjustablebrake head, the

beam-embracing member of which is of twopart construction in order thatit may be more readily assembled upon the bearing sleeve of the beam; toprovide a brake head which after it is .mounted in position will soadjust itself thatthe brake shoe will conform to the tread of the wheelwhenever the angular relation between "the beam and the latter changes,and when so adjusted will remain automatically locked in said position;to provide in a brake head of the above character novel means forautomatically locking the brake head in whatever position it may assumeand at the same time automatically taking up 1any slack or loosenessbetween the bearing parts due to wear or otherwise; to provide novelmeans for positively limiting the angular adjustment of the brake head;to provide improvements in the details of construction of the bearingsleeve whereby lateral displacement of the head is positively prevented,independently of special astenings, such as confining bolts, cotterpins, and the like; to provide a` brake head which can be used withvarious types of beams Without neces sitating revising the constructionof the former; and in general to provide an improved brake head of thecharacter reerred to. l

In the drawings Figure 1 designates a side elevation of our brake head,shown in position upon the trussed beam, parts being broken away andshown in section to bring out details of construction. Fig. 2 is atransverse sectional view, taken on lines 2 2 of 1. Fig. 3 is a rearedge elevation of the parts shown in 1. `Fig. 4 is a fragmentary frontelevation "of the brake of the socket which receives the locking bolt.Fig. 5 is a sectional detail taken through the indirect line 5-5 'ofFig. 2.

Referring to the drawings, 1 designates as a whole our improved brakehead and having the usualV brake shoe supports 2, and hanger-boltapertures 3 for the brake link. As an import-ant feature of ourinvention the bearing member 4 of the head is of two part construction,a movable segment 5 being pivoted or hinged as shown at- 6` to the mainbody of thehead. The brake head is mounted upon a bearing sleeve 7secured to the end of a trussed beam .8, whichcomprises the usualcompression member 9 and tension member 10.

`In constructions heretofore used, the'V brake head has often beenconfined against lateral displacement from the beam by means of specialfastenings, such as confining bolts, cotter pins, and the like, or by:

increasing the frictional engagement between the head and the bearingsleeve. To avoid this We provide -a bearing sleeve having acircumferential groove 11 formed between a pair of shoulders or ribs 12extending around the respective ends of the bearing sleeve 7. It will benoted that the groove is of substantially the same Width as the brakehead in order that the latter may be closely confined and secured inposition. The bearing sleeve is fixed to the end of the beam by means ofa through bolt or vrivet 13, the ends of which are counter sunk in theface of the sleeve as shown at 14. In order to strengthen the bearingsleeve and remove part of the strain upon the bolt 13 the sleeve isprovided with a reduced extension 7 which is secured to the compressionmember by means of a rivet 14. It may also be noted that the fact thatthe bearing ring L fof the brake head is of two part constructionenables it to be assembled upon a bearing sleeve of the above character.

Describing now the manner of locking the head in position upon thebearing sleeve, the main body of the' former is provided with abolt-socket- 15 to receive a locking bolt 18 and a coiled spring 19. Thethreaded end of the bolt 18 extends. through a corresponding aperture 16in an ear like extension of the segment 5. The entrance end of theVsocket 15 is squared, as shown at 20, in order that thehead of the boltmay be confined against turning when the nut 21 is threaded on theopposite end of the bolt. The spring 1,9 acts on bolt 18 to withdraw'the movable sement of the bearing ring toward the main ody of the head,and the nut 21 is held from working loose by means of a split cotter pin23 extending through the outer end of the bolt 18 as shown.

The effect of the above construction is such that after the parts have'been yieldably locked together by the bolt 18 but spaced apart as'shownat 23, they are 'constantly under the tension of the coiled spring 19,so that while the brake head is free to shift angularly through theaction e of the wheel upon the shoe, the spring 19 will automaticallylock the head in its adjusted position.

Describing now the manner of positively limiting the angular adjustmentof the brake head, which forms one feature of our invention, upon theforward inner face of the bearing surface 4 of the head is formed anintegral segmental tongue or rib 26 which is adapted to enter asimilarly formed groove 25 in the opposite bearing surface of the sleeve7 This groove 25 is of substantially greater length than the rib 26, inorder that the head may have considerable angular movement relative tothe sleeve. If desired, the relations of the tongue and groove may bereversed in a well understood manner.

While we have herein shown a preferred construction, it is of courseapparent vthat it may be more or less varied without in any mannerdeparting from the spirit of the invention.

We claim as our invention:

1. The combination with a brake beam, of a bearing sleeve mounted onsaid brake beam and provided at either side with an annular shoulder, anadjustable brake head comprising a body portion and a segmental clampingmember pivotally connected to the body portion, said body portion andclamping member fitting closely around the bea-ring sleeve between theshoulders, the opposed bearing surface of said sleeve being smooth, 'asocket member formed in the lower end of the body portion of said headsuch socket member being square in cross section, open atthe frontendand closed at its rear end, an opposed socket member formed in the lowerend of said pivoted clamping member, a bolt extending through the socketmembers having its squared head seated in the open end of the lirstmentioned socket mernber, a nut screwedto the threaded end of the boltand a coiled eX- pansion spring seated in said` first mentioned socketmember and engaging the closed end of said socket member and head of thebolt Vto draw the two parts of the head together. I

2. The combination with a brake beam, of a bearing sleeve mounted onsaid brake beam, a bolt for securing the sleeve to the beam, the ends ofsaid bolt being countersunk in suitable recesses formed in said sleeve,an annular shoulder at either side of the sleeve, a two-part brake headadjustably mounted in said sleeve between said annular shoulders, saidbrake head comprising a main body portion, and a segmental clampingmember pivotally connected to the main body portion, a segmental tongueintegrally connected to the bearing surface of the head than the tongueto permit limited movement of the head in the sleeve and means forclamping the head to the sleeve, comprising a socket member formed-inthelower end of said main body portion open at its front end and closed atits rear end and polygonal in cross section, an opposed socket membercarried by the lower part ofl said clamping member, a bolt extendingthrough said socket members, the headl of said bolt being polygonal incross section, a nut threaded on the projecting end of the bolt and acoiled expansion spring seated in the socket member of the body portionbetween the closed inner end of the latter and the head of the bolt.

HUBERT M. PERRY. CHARLES F. HUNTOON. Witnesses:

Lois FORCE, v F. L. BELKNAP.

